Download ate carbonate CO3 nitrate NO3 sulfate SO4 phosphate PO4 chlorate

ate
carbonate
CO3-
nitrate
NO3-
sulfate
SO4-
phosphate
PO4-
chlorate
ClO3-
chromate
CrO42-
thiosulfate
S2O32-
oxalate
C2O42-
permanganate
MnO4-
acetate
C2H3O2-
thiocyanate
SCNite
nitrite
NO2-
sulfite
SO32-
chlorite
ClO2-
CuI2
copper(II) iodide
Na2CO3
sodium carbonate
NaHCO3
sodium hydrogen carbonate
BaCrO4
barium chromate
Al2(SO3)3
aluminum sulfite
Na2CrO4
hypocyloorous acid
SF6
sulfur hexafluoride
NaH2PO4
sodium dihydrogen phosphate
NH4HSO4
ammonium hydrogen sulfate
K2HPO4
potassium hydrogen phosphate
(NH4)2HPO4
ammonium hydrogen phosphate
Al(HSO4)3
aluminum hydrogen sulfate
KHS
potassium hydrogen sulfide
Chapter III Stoichiometry
Atomic Masses and the Mass Spectrometer
1) An element consists of 1.40% of an isotope with mass 203.973 amu, 24.10% of an
isotope with mass 205.9745 amu, 22.10% of an isotope with mass 206.9759 amu,
and 52.40% of an isotope with mass 207.9766 amu. Calculate the average atomic
mass and identify the element.
Moles and Molar Masses
1)
2)
3)
4)
5)
6)
Calculate the mass of 500. Atoms of iron (Fe).
What amount (moles) of NH3 is present in 1.00 g ?
What mass of NH3 is present in 5.00 mol ?
What number of molecules are present in 1.00 g of NH3 ?
What number of nitrogen are present in 1.00 g of NH3 ?
What number of hydrogen are present in 1.00 g of NH3 ?
Empirical and Molecular Formulas
1) Express the composition of each of the following compounds as the mass
percents of its elements.
a. CH2O
b. C6H12O6
c. C2H4O2
2) A compound contains 47.08% carbon, 6.59% hydrogen, and 46.33% chlorine by
mass; the molar mass of the compound is 153 g/mol. What are the empirical and
molecular formulas of the compound?
3) Cumene is a compound containing only carbon and hydrogen that is used in the
production of acetone and phenol in the chemical industry. Combustion of 47.6
mg cumene produces some CO2 and 42.8 mg water. The molar mass of cumene is
120 g/mol. Determine the empirical and molecular formulas.
Balancing Chemical Equations
1) Ca(OH)2 + H3PO4 H2O + Ca3(PO4)2
2) Al(OH)3 + HCl AlCl3 + H2O
3) AgNO3 + H2SO4 Ag2SO4 + HNO3